Having customized Ubuntu MATE for quite some time, I was impressed with your screenshot and gave Manjaro KDE a shot.
Since you haven't posted your instructions yet, you might be interested in mine: https://mate-macos.blogspot.com/p/making-manjaro-kde-look-like-macos.html
- Feb 08 2019

Thanks a lot - it's working now :o)
- Jan 28 2019

Great work! I'm using the icons for quite a while now. However, at least for Ubuntu MATE, the Printers, Bluetooth and Mouse icons don't scale (remain at 128px). Did you notice this?
- Jan 25 2019

Fantastic theme, almost no changes required for Ubuntu MATE. I documented the changes in my local gtk.css on this page: https://mate-macos.blogspot.com/p/making-ubuntu-mate-look-like-macos.html . You might consider adding those.
- Jan 25 2019

I did short summary of the retracing my configuration in a VM. Maybe this helps: https://mate-macos.blogspot.com/p/making-ubuntu-mate-look-like-macos.html
- Jan 07 2019

Fantastic theme, almost no changes required for Ubuntu MATE. I documented the changes in my local gtk.css on this page: https://mate-macos.blogspot.com/p/making-ubuntu-mate-look-like-macos.html . You might consider adding those.